<?php

if (! defined('BASEPATH'))
    exit('No direct script access allowed');

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package CodeIgniter
 * @author ExpressionEngine Dev Team
 * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license http://codeigniter.com/user_guide/license.html
 * @link http://codeigniter.com
 * @since Version 1.0
 * @filesource
 *
 */
    
// ------------------------------------------------------------------------

/**
 * Logging Class
 *
 * @package CodeIgniter
 * @subpackage Libraries
 * @category Logging
 * @author ExpressionEngine Dev Team
 * @link http://codeigniter.com/user_guide/general/errors.html
 */
class CI_Log
{

    protected $_log_path;

    protected $_threshold = 1;

    protected $_date_fmt = 'Y-m-d H:i:s';

    protected $_enabled = TRUE;

    protected $_levels = array(
            '1',
            'DEBUG' => '2',
            'INFO' => '3',
            'ALL' => '4'
    );

    /**
     * Constructor
     */
    public function __construct ()
    {
        $config = & get_config();
        
        $this->_log_path = ($config['log_path'] != '') ? $config['log_path'] : APPPATH .
                 'logs/';
        
        if (! is_dir($this->_log_path) or ! is_really_writable($this->_log_path)) {
            $this->_enabled = FALSE;
        }
        
        if (is_numeric($config['log_threshold'])) {
            $this->_threshold = $config['log_threshold'];
        }
        
        if ($config['log_date_format'] != '') {
            $this->_date_fmt = $config['log_date_format'];
        }
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Write Log File
     *
     * Generally this function will be called using the global log_message()
     * function
     *
     * @param
     *            string the error level
     * @param
     *            string the error message
     * @param
     *            bool whether the error is a native PHP error
     * @return bool
     */
    public function write_log ($level = 'error', $msg, $php_error = FALSE)
    {
        if ($this->_enabled === FALSE) {
            return FALSE;
        }
        
        $level = strtoupper($level);
        
        if (! isset($this->_levels[$level]) or
                 ($this->_levels[$level] > $this->_threshold)) {
            return FALSE;
        }
        
        $filepath = $this->_log_path . 'log-' . date('Y-m-d') . '.php';
        $message = '';
        
        if (! file_exists($filepath)) {
            $message .= "<" .
                     "?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed'); ?" .
                     ">\n\n";
        }
        
        if (! $fp = @fopen($filepath, FOPEN_WRITE_CREATE)) {
            return FALSE;
        }
        
        $message .= $level . ' ' . (($level == 'INFO') ? ' -' : '-') . ' ' .
                 date($this->_date_fmt) . ' --> ' . $msg . "\n";
        
        flock($fp, LOCK_EX);
        fwrite($fp, $message);
        flock($fp, LOCK_UN);
        fclose($fp);
        
        @chmod($filepath, FILE_WRITE_MODE);
        return TRUE;
    }
}
// END Log Class

/* End of file Log.php */
/* Location: ./system/libraries/Log.php */